Legal analysis: No, all appraisal materials need cross-examination, and materials without cross-examination cannot be used as the basis for appraisal. According to the provisions of the Civil Procedure Law, the copy that cannot be checked with the original cannot be used as the basis for finalizing the case, so the copy cannot be used as the basis for handwriting identification.

Handwriting identification refers to the recognition and identification of handwriting formed by people through writing activities. People's writing habits are concrete and stable, which are reflected in handwriting. Through the inspection of handwriting, we can determine whether the handwriting in the document was written by several people or by one person, and use handwriting to identify the same person and verify the authenticity of the document. We should understand the relevant situation of the case, clarify the requirements for identification, and review the handwriting material evidence and handwriting samples; Analyze and judge whether the handwriting is normal, whether there are changes caused by camouflage or other reasons; Choose stable characteristics that can reflect the writer's writing habits; Compare the samples with the features found in the samples, and find out the coincidence points and differences; Comprehensive evaluation of the reasons for the formation of coincidence points and differences; Make an appraisal opinion and make an appraisal book.

Legal basis: Article 66 of the Civil Procedure Law of People's Republic of China (PRC), when the people's court receives the evidential materials submitted by the parties, it shall issue a receipt indicating the name, number of pages, number of copies, original or photocopy of the evidence, and the time of receipt, which shall be signed or sealed by the person in charge.